package com.quanyou.utils;

public class RandomUtils {

    private static String[] randomValues = new String[]{
            "0","1","2","3","4","5","6","7","8","9",
            "a","b","c","d","e","f","g","h","i","j",
            "k","l","m","n","u","t","s","o","x","v",
            "p","q","r","w","y","z"};

    private static String[] randomNums = new String[]{
            "0","1","2","3","4","5","6","7","8","9",
            };

    public static String getStr(int lenght) {
        StringBuffer str = new StringBuffer();
        for(int i = 0;i < lenght; i++) {
            Double number=Math.random()*(randomValues.length-1);
            str.append(randomValues[number.intValue()]);
        }
        return str.toString();
    }

    public static String getNum(int lenght) {
        StringBuffer str = new StringBuffer();
        for(int i = 0;i < lenght; i++) {
            Double number=Math.random()*(randomNums.length-1);
            str.append(randomNums[number.intValue()]);
        }
        return str.toString();
    }

}